Singh, Sukhdeep and Ralhan, N. K. and Kotnala, R. K. and Verma, Kuldeep Chand (2012) Nanosize dependent electrical and magnetic properties of NiFe2O4 ferrite. Indian Journal of Pure and Applied Physics, 50 (10). 739-743. ISSN 0019-5596

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Abstract

The effect of nanosize particles on dielectric and magnetic properties of NiFe2O4 (NF) ferrite has been studied. NF nanoferrites were prepared by a chemical combustion route followed by annealing temperatures from 400 degrees to 700 degrees C. The X-ray diffraction (XRD) shows minor amorphous behaviour of NF at 400 degrees C. However, spinel ferrite structure has been observed with higher annealing in the temperature range 500-700 degrees C. The average particles size is measured using Debye-Scherer's relation. The particle's size is also measured by transmission electron microscopy and the average value is at nm scale. Room temperature dielectric properties viz.; dielectric constant (epsilon) and loss (tan delta) for all the specimens have been studied as a function of applied frequency in the range 100 Hz-20 MHz. These studies indicate that the values of epsilon and tan delta depend on the size of particles. The cole-cole plot of impedance spectroscopy has been used to find the grain size and boundary effect on electrical properties of NF nanograins. The magnetic measurements show the value of saturation magnetization (M-s) is 0.003, 44.95, 38.83, 45.26 emu/g, respectively, observed at 400 degrees, 500 degrees, 600 degrees and 700 degrees C.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s NISCAIR
Subjects:	Engineering > Electronics and Electrical Engineering Materials Science Applied Physics/Condensed Matter Physics
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 11:06
Last Modified:	19 Aug 2026 11:06
URI:	https://npl.csircentral.net/id/eprint/3477

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